The monograph will be interesting for young scientists in the field of telecommunications In the work are the main principles of parallel telecommunication systems. In the basis of these principles lies parallel processing of data and development of telecommunication devices on a parallel basis. For the following theoretical base was used system of residual classes. Data in this system can be processed in parallel without transfer digits. Elements of telecommunications proposed to implement in the neural network which has parallelism and the ability to learn or setting up an obstacle. In the basis of the book lies the theory of transfer and processing of parallel data by parallel elements of telecommunications. The book offered some of neural networks and put some outstanding issues, such as training of neural networks in the mirror mathematics.